Disk-grinder.



I'NO. 872,

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simple and easily adjustable grin JOHN M. ROSS AND JOHN'S. RIDDELL, or FROBISHER'SASKATOHEWAN, CANADA.

DISK-GRINDER.

'To all whom it may concern:

Be it known that we, JOHN M. Ross, blackb smith, and JOHN S. RIDDELL, merchant, both of Frobisher, in the Province of Saskatchehave invented certain new and useful Improvements in Disk-Grinders, of which the following is a specification.

Our invention relates to improvements in disk grinders and the objects of our invention are to provide an exceedin ly cheap,

der for the and sharpening the disks 1n connection with the variousforms of disk plows, disk barrows, disk drills as well as plow when and by means purpose of grinding of which when the disk has once been placed in position in the machine it will not be necessary to move it therefrom until the whole of the disk has been ground; and it consists essentially of a suitable base, a grinding wheel mounted thereon, a disk supporting shaft, a 'tiltably supported f1 ame supporting the shaft, means for holding the same in any adjusted position, means for moving the frame to and from the grinding wheel and means for adjusting the position of the shaft rela-- tive to the frame, the Various parts of the device being constructed and arranged in detail as hereinafter more particularly described.

Fi ure 1 is a perspective view of our disk grinder. Fig. 2 is a sectional view throu h the top of the disk. Fig. 3 is asectional detail showing the corrugated plate to which the shaft supporting frame is adjustably secured. Fig.- 4 is a sectional view on the line 22 Fig. 3.

In the drawings like letters of reference indicate corresponding parts in each figure. A is the base of our machine which maybe of any desirable construction preferably having the rinding wheel B of emery or the like mounted on a horizontal shaft a supported in bearings b from the top of the base. The grinding wheel is preferably. rotated by means of a belt C which connects a pulle c on the shaft a to a large driving wheel d which is supported on the base and has thereon a hand operating lever e. Ifdesired however, the driving wheel (2 might be connected to a suitable source of mechanical power.

Specification of Letters Patent. Application filed May 28. 1906, Serial No. 318.415.

adjustably secured by means of a Patented Dec. 3, 1967.

Preferably the disk is attached to the shaft y means of a fixed collar f abutting the side of the diskto be round and a plate g'abutting the side of the disk which is not to be ground and being held in contact therewith by means of a nut'i screwed on the end of the shaft D. To deaden the sound produced by the disk while bein ground we insert an annular ring 7' of leather, rubber or like material between the disk E and the plate 9.

The shaft D is slidably held in the two outwardly extending arms 7c and Z of a frame F which is pivoted by means of a bolt in to a plate G. To hold the frame in any position to which it may be tilted we provide Integral therewith a projecting tenon n which .is adapted to engage one of a plurality of radial slots 0 provided in the'surface of the plate G. The plate G is itself slidably held 1n position on a fixed bar H supported from the frame by means of-a bracket preferably by providing a slot 9- in the side of the late into which fits the bar H. The plate is eld in any position to which it has been adjusted by means of the bolt m which extends through. a slot r in the bar H.

I is a lever pivoted at s to the frame and provided intermediate of its len th with a slot t through which extends the shaft D. I

On the shaft above the slot t a collar J is small setscrew the bottom of the collar which will normally rest on the top of the lever being formed of a suitable bearing material. The lever is held in position by means of a dog K held in position by means of a spring u and.

the end 1) of which engages the lower arm 7:: of the frame. An operating handle w is pivoted near the end of the lever I and connect ed by means of a bar or wire a: to the dog K whereby the same maybe withdrawn from contact. with the arm k when it is desired to adjust the machine. movement of the shaft ably secured thereon.

In the operation of our device the disk to be ground is secured on the end of the shaft D as hereinbefore described. The angular position of the shaft is adjusted by tilting the th Tolimit the upward the collar y is adjusta'me F and the distance of the disk from e emery wheel is adjusted by means of the plate G sliding on the bar H. The vertical position of the disk is adjusted by means of the collar J on the shaft. By means of these three adjustments the exact part .of the disks desired be ground can be broughir bearing it' with the shaft D. Thus "an annular poroft forms of tion of thedisk will be ground evenly all around and when it is desired to grind .another portion of it the inclination of'the disk to the emery wheel is adjusted by means -of the'tilting of the frame F. The height of the collar J on the shaft D should be just sufficient to allow the disk E to bear slightly on the emery wheel. 1 4 It will be observed that after once putting the disk on the shaft it is not necessary to again handle it except to remove it when complletely sharpened, as by the adjustment e various parts as hereinbefore described the edge of the disk may becompletely ground. It is evident that the sharpenin device may be appliedto other isks and if desired the whole surface of the disk could be ground or polished. While we have described with great par-- ticularity of detail one specific embodiment of our invention yet it is not to be understood therefrom that the construction is limited thereto as certain changes-might be made in the details thereof within the scope of the a pended claims without' departing from t e s irit of our invention. I

W at we claim as our invention is 1. An improved di k grindernom risinga grinding wheel, means for rotating t e same, a'disk supportin shaft, vertically movable and gravity hel in its lowest position, a frame sup orting-the same,-a tenon on the frame, a p ate, a plurality of radial groovesv therein, adapted to be engaged b said tenon F and means for supporting the p ate, as and for the purpose SPBGlfiGd.

2. An improved disk grinder com rising a grinding wheel, means for rotating t e same,

a frame a shaft slidably'supported therein, means for pivotally supporting the frame,

' the shaft extendsand 'a s ring ower arm of "the.

means for holding the frame in any position to which it has been adjusted, a lever pivoted to the frame having a slot" therein through which the shaft extends, a collar adjustably secured on the shaft, a spring-held dog pivoted to the lever normally engaging the frame, and means operably from the end of the lever for removing the dog from engagement with. the frame as and for. the purpose specified.

3. An improved disk grinder comprising a suitable base, a shaft horizontally supported on the top thereof, a grinding wheel on the same, means for rotating the shaft, a bar laterally extending from one side of the-base, a

. late slidably secured thereon, means for olding the plate in any adjusted position, a lurality of radial grooves in rame, a tei on thereon engaging the grooves said,- plate, a

in the plate, a shaft slidably supportedin the frame and means for holding the shaft in any position relative to the frame asand for thepurpose specified.

4. An improved disk grinder comprising a suitable base, a shaft horizontally supported on top thereof, a grinding wheel on said shaft, means for rotating the shaft, a bar laterall extending from one SldGOf the base and aving-a longitudinal groove therein, a plate having a plurality o radial grooves therein, a U- haped frame, a tenon thereon adapted to engage the grooves in the plate, a

slot in the bar, a disk supporting shaft exadjustable collar thereon, a lever pivoted to the shaft having a slot therein through which held dog on said lever en aging the frame as and 'or thepur'pose specified.

a bolt extending through said frame, plate and,

Signed at Saskatchewan, this eighth day" of May, 1906.

JOHN M. ROSS. JOHN S. RIDDELL. 'Witnesses:

ADA MoKEowN, H. O. MAoCoLL.

tending through the arms, of the frame, an i 

